/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package streaming.source.parser

import org.apache.spark.sql.catalyst.expressions.Expression
import org.apache.spark.sql.{Column, Row}
import streaming.source.parser.impl.{CsvSourceParser, JsonSourceParser}

/**
 * Created by allwefantasy on 14/9/2018.
 */
trait SourceParser extends Serializable {
  def parse(column: Column, sourceSchema: SourceSchema, options: Map[String, String]): Column

  def withExpr(expr: Expression): Column = new Column(expr)

}

object SourceParser {
  def getSourceParser(name: String): SourceParser = {
    if (name.contains(".")) {
      Class.forName(name).newInstance().asInstanceOf[SourceParser]
    } else {
      name match {
        case "json" => new JsonSourceParser()
        case "csv" => new CsvSourceParser()
      }
    }
  }
}
